//Exercise 2-ES-1.
//Exercise 4.

public class Arithmetic
{
    public static void main (String[] args)
    {
        int num = 100;
        int factor = 20;
        int sum = 0;

        sum = num + factor; // 100+20
        System.out.println("Addition sum: " + sum);

        sum = num - factor; // 100-20
        System.out.println("Subtraction sum: " + sum);

        sum = num * factor;  // 100*20
        System.out.println("Multiplication sum: " + sum);

        sum = num / factor;  // 100/20
        System.out.println("Division sum: " + sum);
    }
}